Flame Flashback Resistant Gas Burner

ABSTRACT

A gas burner includes: a base having a bottom wall and a surrounding wall that extends upwardly from the bottom wall, that cooperates with the bottom wall to define an inner space, and that is formed with flame apertures in fluid communication with the inner space; a partitioning unit dividing the inner space into a main gas chamber and at least one buffer gas chamber separated from the main gas chamber, the partitioning wall being formed with through-holes that are in fluid communication with the main gas chamber and the buffer gas chamber and that open toward the bottom wall of the base; and a gas input conduit secured to the bottom wall of the base and in fluid communication with the main gas chamber.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a gas burner, more particularly to a gas burnerthat is resistant to flame flashback.

2. Description of the Related Art

As shown in Figures land 2, a conventional gas burner includes a burnerbody 1 and a gas input conduit 2 extending outwardly from a bottom ofthe burner body 1. The burner body 1 includes a bottom wall 103, asurrounding wall 105 that extends upwardly from the bottom wall 102, anda top wall 104 covering a top opening of the surrounding wall 105. Theburner body 1 defines an inner space 101 therein. The surrounding wall105 is formed with a plurality of flame apertures 107 in fluidcommunication with the inner space 101 and the atmosphere. The gas inputconduit 2 is secured to the bottom wall 103 of the burner body 1, anddefines a gas input channel 201 in fluid communication with the innerspace 101.

In use, the combustible gas is introduced into the inner space 101 inthe burner body 1 through the gas input channel 201 in the gas inputconduit 2, discharges into the atmosphere through the flame apertures107, and is ignited at the flame apertures 107.

The conventional gas burner in disadvantageous in that, since asignificant amount of the gas remains in the inner space 101 in theburner body 1 when the gas burner is turned off, explosion in the innerspace 101 is likely to occur due to flame flashback, which can result indamage to the gas burner.

SUMMARY OF THE INVENTION

Therefore, the main object of the present invention is to provide a gasburner that can overcome the aforesaid drawback associated with theprior art.

Accordingly, a gas burner of this invention comprises: a base having abottom wall and a surrounding wall that extends upwardly from the bottomwall, that cooperates with the bottom wall to define an inner spacetherein, and that is formed with a plurality of flame apertures in fluidcommunication with the inner space and the atmosphere, the surroundingwall having a top opening; a partitioning unit dividing the inner spaceinto a main gas chamber and at least one buffer gas chamber separatedfrom the main gas chamber, the partitioning wall being formed with aplurality of through-holes that are in fluid communication with the maingas chamber and the buffer gas chamber and that open toward the bottomwall of the base; a cover covering the top opening of the surroundingwall of the base; and a gas input conduit secured to the bottom wall ofthe base and in fluid communication with the main gas chamber.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the present invention will becomeapparent in the following detailed description of the preferredembodiment with reference to the accompanying drawings, of which:

FIG. 1 is a schematic partly sectional view of a conventional gasburner;

FIG. 2 is another sectional view of the conventional gas burner;

FIG. 3 is a schematic partly cutaway view of the preferred embodiment ofa gas burner according to the present invention;

FIG. 4 is a sectional view taken along lines IV-IV in FIG. 3; and

FIG. 5 is a sectional view taken along lines in V-V FIG. 4.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

As shown in FIGS. 3 to 5, the preferred embodiment of a gas burneraccording to the present invention includes: a base 11 having a bottomwall 111 and a surrounding wall 112 that extends upwardly from thebottom wall 111, that cooperates with the bottom wall 111 to define aninner space 14 therein, and that is formed with a plurality of flameapertures 114 in fluid communication with the inner space 14 and theatmosphere, the surrounding wall 112 having a top opening; apartitioning unit 13 dividing the inner space 14 into a main gas chamber141 and at least one buffer gas chamber 142 separated from the main gaschamber 141, the partitioning unit 13 being formed with a plurality ofthrough-holes 135 that are in fluid communication with the main gaschamber 141 and the buffer gas chamber 142 and that open toward thebottom wall 111 of the base 11; a cover 12 covering the top opening ofthe surrounding wall 112 of the base 11; and a gas input conduit 20secured to the bottom wall 111 of the base 11 and including a gas inputchannel 21 in fluid communication with the main gas chamber 141.

In this embodiment, the surrounding wall 112 has two opposite side wallportions 112′ that are formed with the flame apertures 114. Thepartitioning unit 13 includes two opposite partitioning walls 13′ thatare respectively disposed adjacent to the side wall portions 112′ of thesurrounding wall 112 of the base 11 and that cooperate with the base 11to define two of the buffer gas chambers 142. Each of the partitioningwalls 13′ has a vertical wall portion 132 that is disposed adjacent toand that confronts the flame apertures 114 in the respective one of theside wall portions 112′ of the surrounding wall 112, and a horizontalwall portion 133 that is transverse relative to the vertical wallportion 132 and that is disposed adjacent to and that confronts thebottom wall 111. The through-holes 135 are formed in the horizontal wallportions 131 of the partitioning walls 13′. The vertical and horizontalwall portions 132, 133 of each of the partitioning walls 13′ aresubstantially and respectively parallel to the respective one of theside wall portions 112′ of the surrounding wall 112 and the bottom wall111 such that each of the buffer gas chambers 142 has an L-shapedcross-section.

Preferably, referring again to FIG. 5, each of the partitioning walls13′ further has a positioning portion 134 extending outwardly andtransversely from a top edge of the vertical wall portion 132. Each ofthe side wall portions 112′ of the surrounding wall 112 of the base 11has a rim 1121 extending outwardly and transversely therefrom. The cover12 includes a main cover portion 121 and two opposite hook portions 122extending respectively from two edges of the main cover portion 121 andcooperating with the main cover portion 121 to define two retaininggrooves. The rim 1121 of each of the side wall portions 112′ and thepositioning portion 134 of a respective one of the partitioning walls13′ extend into a respective one of the retaining grooves, and arepressed together with a respective one of the hook portions 122 of thecover 12.

In use, the combustible gas is introduced into the main gas chamber 141through the gas input channel 21, and then passes through thethrough-holes 135, the buffer gas chambers 142, and the flame apertures114 so as to be ignited at the flame apertures 114 (as best shown inFIG. 5).

By virtue of the partitioning walls 13′ installed in the inner space 14in the base 11 of the gas burner of this invention, the aforesaidexplosion drawback associated with the conventional gas burner can beeliminated.

While the present invention has been described in connection with whatis considered the most practical and preferred embodiment, it isunderstood that this invention is not limited to the disclosedembodiment but is intended to cover various arrangements included withinthe spirit and scope of the broadest interpretation so as to encompassall such modifications and equivalent arrangements.

1. A gas burner comprising: a base having a bottom wall and asurrounding wall that extends upwardly from said bottom wall, thatcooperates with said bottom wall to define an inner space therein, andthat is formed with a plurality of flame apertures in fluidcommunication with said inner space and the atmosphere, said surroundingwall having a top opening; a partitioning unit dividing said inner spaceinto a main gas chamber and at least one buffer gas chamber separatedfrom said main gas chamber, said partitioning unit being formed with aplurality of through-holes that are in fluid communication with saidmain gas chamber and said buffer gas chamber and that open toward saidbottom wall of said base; a cover covering said top opening of saidsurrounding wall of said base; and a gas input conduit secured to saidbottom wall of said base and in fluid communication with said main gaschamber.
 2. The gas burner as claimed in claim 1, wherein saidpartitioning unit includes a partitioning wall having a vertical wallportion that is disposed adjacent to and that confronts said flameapertures in said surrounding wall, and a horizontal wall portion thatis transverse relative to said vertical wall portion and that isdisposed adjacent to and that confronts said bottom wall, saidthrough-holes being formed in said partitioning wall.
 3. The gas burneras claimed in claim 2, wherein said vertical and horizontal wallportions of said partitioning wall are substantially and respectivelyparallel to said surrounding wall and said bottom wall.
 4. The gasburner as claimed in claim 3, wherein said buffer gas chamber has anL-shaped cross-section.